diff --git a/src/main/java/org/orekit/rugged/intersection/ConstantElevationAlgorithm.java b/src/main/java/org/orekit/rugged/intersection/ConstantElevationAlgorithm.java
index 1cc4e2e8cd9310b9828bedfda48328b30347f1a6..73ab6d8fdb6160970c7015b59549101f434d983f 100644
--- a/src/main/java/org/orekit/rugged/intersection/ConstantElevationAlgorithm.java
+++ b/src/main/java/org/orekit/rugged/intersection/ConstantElevationAlgorithm.java
@@ -25,7 +25,7 @@ import org.orekit.rugged.utils.NormalizedGeodeticPoint;
 
 /** Intersection ignoring Digital Elevation Model.
  * <p>
- * This dummy implementation simply uses the ellipsoid itself.
+ * This implementation uses a constant elevation over the ellipsoid.
  * </p>
  * @author Luc Maisonobe
  */
diff --git a/src/main/java/org/orekit/rugged/raster/TileUpdater.java b/src/main/java/org/orekit/rugged/raster/TileUpdater.java
index 2e6c03f4c6460f49e03e29c623fd620233de08ce..509ca6e9075dcf955e3fb52bbf87e8979a1645cd 100644
--- a/src/main/java/org/orekit/rugged/raster/TileUpdater.java
+++ b/src/main/java/org/orekit/rugged/raster/TileUpdater.java
@@ -18,7 +18,7 @@ package org.orekit.rugged.raster;
 
 /** Interface used to update Digital Elevation Model tiles.
  * <p>
- * Implementations of this interface are must be provided by
+ * Implementations of this interface must be provided by
  * the image processing mission-specific layer, thus allowing
  * the Rugged library to access the Digital Elevation Model data.
  * </p>